bool
ThreadHandler::HandleBreakpointHit(BreakpointHitEvent* event)
{
CpuState* cpuState = event->GetCpuState();
target_addr_t instructionPointer = cpuState->InstructionPointer();
TRACE_EVENTS("ThreadHandler::HandleBreakpointHit(): ip: %" B_PRIx64 "\n",
instructionPointer);
// check whether this is a temporary breakpoint we're waiting for
if (fBreakpointAddress != 0 && instructionPointer == fBreakpointAddress
&& fStepMode != STEP_NONE) {
if (fStepMode != STEP_UNTIL && _HandleBreakpointHitStep(cpuState))
return true;
} else {
// Might be a user breakpoint, but could as well be a temporary
// breakpoint of another thread.
AutoLocker<Team> locker(fThread->GetTeam());
Breakpoint* breakpoint = fThread->GetTeam()->BreakpointAtAddress(
cpuState->InstructionPointer());
bool continueThread = false;
if (breakpoint == NULL) {
// spurious breakpoint -- might be a temporary breakpoint, that has
// already been uninstalled
continueThread = true;
} else if (!breakpoint->HasEnabledUserBreakpoint()) {
// breakpoint of another thread or one that has been disabled in
// the meantime
continueThread = true;
}
if (continueThread) {
if (fSingleStepping) {
// We might have hit a just-installed software breakpoint and
// thus haven't stepped at all. Just try again.
if (fPreviousInstructionPointer == instructionPointer) {
fDebuggerInterface->SingleStepThread(ThreadID());
return true;
}
// That shouldn't happen. Try something reasonable anyway.
if (fStepMode != STEP_NONE) {
if (_HandleSingleStepStep(cpuState))
return true;
}
}
return false;
}
}
return _HandleThreadStopped(cpuState, THREAD_STOPPED_BREAKPOINT);
}
status_t
DebugReportGenerator::_DumpDebuggedThreadInfo(BString& _output,
::Thread* thread)
{
AutoLocker< ::Team> locker;
if (thread->State() != THREAD_STATE_STOPPED)
return B_OK;
StackTrace* trace = NULL;
for (;;) {
trace = thread->GetStackTrace();
if (trace != NULL)
break;
locker.Unlock();
status_t result = acquire_sem(fTeamDataSem);
if (result != B_OK)
return result;
locker.Lock();
}
_output << "\t\tFrame\t\tIP\t\t\tFunction Name\n";
_output << "\t\t-----------------------------------------------\n";
BString data;
for (int32 i = 0; StackFrame* frame = trace->FrameAt(i); i++) {
char functionName[512];
data.SetToFormat("\t\t%#08" B_PRIx64 "\t%#08" B_PRIx64 "\t%s\n",
frame->FrameAddress(), frame->InstructionPointer(),
UiUtils::FunctionNameForFrame(frame, functionName,
sizeof(functionName)));
_output << data;
}
_output << "\n\t\tRegisters:\n";
CpuState* state = thread->GetCpuState();
BVariant value;
const Register* reg = NULL;
for (int32 i = 0; i < fArchitecture->CountRegisters(); i++) {
reg = fArchitecture->Registers() + i;
state->GetRegisterValue(reg, value);
char buffer[64];
data.SetToFormat("\t\t\t%5s:\t%s\n", reg->Name(),
UiUtils::VariantToString(value, buffer, sizeof(buffer)));
_output << data;
}
return B_OK;
}
bool
ThreadHandler::_HandleSetAddress(CpuState* state, target_addr_t address)
{
CpuState* newState = NULL;
if (state->Clone(newState) != B_OK)
return false;
BReference<CpuState> stateReference(newState, true);
newState->SetInstructionPointer(address);
if (fDebuggerInterface->SetCpuState(fThread->ID(), newState) != B_OK)
return false;
AutoLocker<Team> locker(fThread->GetTeam());
fThread->SetStackTrace(NULL);
fThread->SetCpuState(newState);
return true;
}
status_t
DwarfImageDebugInfo::CreateFrame(Image* image,
FunctionInstance* functionInstance, CpuState* cpuState,
bool getFullFrameInfo, ReturnValueInfoList* returnValueInfos,
StackFrame*& _frame, CpuState*& _previousCpuState)
{
DwarfFunctionDebugInfo* function = dynamic_cast<DwarfFunctionDebugInfo*>(
functionInstance->GetFunctionDebugInfo());
FunctionID* functionID = functionInstance->GetFunctionID();
BReference<FunctionID> functionIDReference;
if (functionID != NULL)
functionIDReference.SetTo(functionID, true);
DIESubprogram* entry = function != NULL
? function->SubprogramEntry() : NULL;
TRACE_CFI("DwarfImageDebugInfo::CreateFrame(): subprogram DIE: %p, "
"function: %s\n", entry,
functionID->FunctionName().String());
int32 registerCount = fArchitecture->CountRegisters();
const Register* registers = fArchitecture->Registers();
// get the DWARF <-> architecture register maps
RegisterMap* toDwarfMap;
RegisterMap* fromDwarfMap;
status_t error = fArchitecture->GetDwarfRegisterMaps(&toDwarfMap,
&fromDwarfMap);
if (error != B_OK)
return error;
BReference<RegisterMap> toDwarfMapReference(toDwarfMap, true);
BReference<RegisterMap> fromDwarfMapReference(fromDwarfMap, true);
// create a clean CPU state for the previous frame
CpuState* previousCpuState;
error = fArchitecture->CreateCpuState(previousCpuState);
if (error != B_OK)
return error;
BReference<CpuState> previousCpuStateReference(previousCpuState, true);
// create the target interfaces
UnwindTargetInterface* inputInterface
= new(std::nothrow) UnwindTargetInterface(registers, registerCount,
fromDwarfMap, toDwarfMap, cpuState, fArchitecture,
fDebuggerInterface);
if (inputInterface == NULL)
return B_NO_MEMORY;
BReference<UnwindTargetInterface> inputInterfaceReference(inputInterface,
true);
UnwindTargetInterface* outputInterface
= new(std::nothrow) UnwindTargetInterface(registers, registerCount,
fromDwarfMap, toDwarfMap, previousCpuState, fArchitecture,
fDebuggerInterface);
if (outputInterface == NULL)
return B_NO_MEMORY;
BReference<UnwindTargetInterface> outputInterfaceReference(outputInterface,
true);
// do the unwinding
target_addr_t instructionPointer
= cpuState->InstructionPointer() - fRelocationDelta;
target_addr_t framePointer;
CompilationUnit* unit = function != NULL ? function->GetCompilationUnit()
: NULL;
error = fFile->UnwindCallFrame(unit, fArchitecture->AddressSize(), entry,
instructionPointer, inputInterface, outputInterface, framePointer);
if (error != B_OK) {
TRACE_CFI("Failed to unwind call frame: %s\n", strerror(error));
return B_UNSUPPORTED;
}
TRACE_CFI_ONLY(
TRACE_CFI("unwound registers:\n");
for (int32 i = 0; i < registerCount; i++) {
const Register* reg = registers + i;
BVariant value;
if (previousCpuState->GetRegisterValue(reg, value)) {
TRACE_CFI(" %3s: %#" B_PRIx64 "\n", reg->Name(),
value.ToUInt64());
} else
TRACE_CFI(" %3s: undefined\n", reg->Name());
}
)
status_t
LocalDebuggerInterface::_CreateDebugEvent(int32 messageCode,
const debug_debugger_message_data& message, bool& _ignore,
DebugEvent*& _event)
{
DebugEvent* event = NULL;
switch (messageCode) {
case B_DEBUGGER_MESSAGE_THREAD_DEBUGGED:
event = new(std::nothrow) ThreadDebuggedEvent(message.origin.team,
message.origin.thread);
break;
case B_DEBUGGER_MESSAGE_DEBUGGER_CALL:
event = new(std::nothrow) DebuggerCallEvent(message.origin.team,
message.origin.thread,
(target_addr_t)message.debugger_call.message);
break;
case B_DEBUGGER_MESSAGE_BREAKPOINT_HIT:
{
CpuState* state = NULL;
status_t error = fArchitecture->CreateCpuState(
&message.breakpoint_hit.cpu_state,
sizeof(debug_cpu_state), state);
if (error != B_OK)
return error;
event = new(std::nothrow) BreakpointHitEvent(message.origin.team,
message.origin.thread, state);
state->ReleaseReference();
break;
}
case B_DEBUGGER_MESSAGE_WATCHPOINT_HIT:
{
CpuState* state = NULL;
status_t error = fArchitecture->CreateCpuState(
&message.watchpoint_hit.cpu_state,
sizeof(debug_cpu_state), state);
if (error != B_OK)
return error;
event = new(std::nothrow) WatchpointHitEvent(message.origin.team,
message.origin.thread, state);
state->ReleaseReference();
break;
}
case B_DEBUGGER_MESSAGE_SINGLE_STEP:
{
CpuState* state = NULL;
status_t error = fArchitecture->CreateCpuState(
&message.single_step.cpu_state,
sizeof(debug_cpu_state), state);
if (error != B_OK)
return error;
event = new(std::nothrow) SingleStepEvent(message.origin.team,
message.origin.thread, state);
state->ReleaseReference();
break;
}
case B_DEBUGGER_MESSAGE_EXCEPTION_OCCURRED:
event = new(std::nothrow) ExceptionOccurredEvent(
message.origin.team, message.origin.thread,
message.exception_occurred.exception);
break;
case B_DEBUGGER_MESSAGE_TEAM_DELETED:
if (message.origin.team != fTeamID) {
_ignore = true;
return B_OK;
}
event = new(std::nothrow) TeamDeletedEvent(message.origin.team,
message.origin.thread);
break;
case B_DEBUGGER_MESSAGE_TEAM_EXEC:
if (message.origin.team != fTeamID) {
_ignore = true;
return B_OK;
}
event = new(std::nothrow) TeamExecEvent(message.origin.team,
message.origin.thread);
break;
case B_DEBUGGER_MESSAGE_THREAD_CREATED:
event = new(std::nothrow) ThreadCreatedEvent(message.origin.team,
message.origin.thread, message.thread_created.new_thread);
break;
case B_DEBUGGER_MESSAGE_THREAD_DELETED:
event = new(std::nothrow) ThreadDeletedEvent(message.origin.team,
message.origin.thread);
break;
case B_DEBUGGER_MESSAGE_IMAGE_CREATED:
{
const image_info& info = message.image_created.info;
event = new(std::nothrow) ImageCreatedEvent(message.origin.team,
message.origin.thread,
ImageInfo(fTeamID, info.id, info.name, info.type,
(addr_t)info.text, info.text_size, (addr_t)info.data,
info.data_size));
break;
}
case B_DEBUGGER_MESSAGE_IMAGE_DELETED:
{
const image_info& info = message.image_deleted.info;
event = new(std::nothrow) ImageDeletedEvent(message.origin.team,
message.origin.thread,
ImageInfo(fTeamID, info.id, info.name, info.type,
(addr_t)info.text, info.text_size, (addr_t)info.data,
info.data_size));
break;
}
case B_DEBUGGER_MESSAGE_POST_SYSCALL:
{
event = new(std::nothrow) PostSyscallEvent(message.origin.team,
message.origin.thread,
SyscallInfo(message.post_syscall.start_time,
message.post_syscall.end_time,
message.post_syscall.return_value,
message.post_syscall.syscall, message.post_syscall.args));
break;
}
case B_DEBUGGER_MESSAGE_SIGNAL_RECEIVED:
{
event = new(std::nothrow) SignalReceivedEvent(message.origin.team,
message.origin.thread,
SignalInfo(message.signal_received.signal,
message.signal_received.handler,
message.signal_received.deadly));
break;
}
default:
printf("DebuggerInterface for team %" B_PRId32 ": unknown message "
"from kernel: %" B_PRId32 "\n", fTeamID, messageCode);
// fall through...
case B_DEBUGGER_MESSAGE_TEAM_CREATED:
case B_DEBUGGER_MESSAGE_PRE_SYSCALL:
case B_DEBUGGER_MESSAGE_PROFILER_UPDATE:
case B_DEBUGGER_MESSAGE_HANDED_OVER:
_ignore = true;
return B_OK;
}
if (event == NULL)
return B_NO_MEMORY;
if (message.origin.thread >= 0 && message.origin.nub_port >= 0)
event->SetThreadStopped(true);
_ignore = false;
_event = event;
return B_OK;
}
status_t
DwarfImageDebugInfo::CreateFrame(Image* image,
FunctionInstance* functionInstance, CpuState* cpuState,
StackFrame*& _previousFrame, CpuState*& _previousCpuState)
{
DwarfFunctionDebugInfo* function = dynamic_cast<DwarfFunctionDebugInfo*>(
functionInstance->GetFunctionDebugInfo());
if (function == NULL)
return B_BAD_VALUE;
TRACE_CFI("DwarfImageDebugInfo::CreateFrame(): subprogram DIE: %p\n",
function->SubprogramEntry());
int32 registerCount = fArchitecture->CountRegisters();
const Register* registers = fArchitecture->Registers();
// get the DWARF <-> architecture register maps
RegisterMap* toDwarfMap;
RegisterMap* fromDwarfMap;
status_t error = fArchitecture->GetDwarfRegisterMaps(&toDwarfMap,
&fromDwarfMap);
if (error != B_OK)
return error;
Reference<RegisterMap> toDwarfMapReference(toDwarfMap, true);
Reference<RegisterMap> fromDwarfMapReference(fromDwarfMap, true);
// create a clean CPU state for the previous frame
CpuState* previousCpuState;
error = fArchitecture->CreateCpuState(previousCpuState);
if (error != B_OK)
return error;
Reference<CpuState> previousCpuStateReference(previousCpuState, true);
// create the target interfaces
UnwindTargetInterface* inputInterface
= new(std::nothrow) UnwindTargetInterface(registers, registerCount,
fromDwarfMap, toDwarfMap, cpuState, fArchitecture, fTeamMemory);
if (inputInterface == NULL)
return B_NO_MEMORY;
Reference<UnwindTargetInterface> inputInterfaceReference(inputInterface,
true);
UnwindTargetInterface* outputInterface
= new(std::nothrow) UnwindTargetInterface(registers, registerCount,
fromDwarfMap, toDwarfMap, previousCpuState, fArchitecture,
fTeamMemory);
if (outputInterface == NULL)
return B_NO_MEMORY;
Reference<UnwindTargetInterface> outputInterfaceReference(outputInterface,
true);
// do the unwinding
target_addr_t instructionPointer
= cpuState->InstructionPointer() - fRelocationDelta;
target_addr_t framePointer;
CompilationUnit* unit = function->GetCompilationUnit();
error = fFile->UnwindCallFrame(unit, function->SubprogramEntry(),
instructionPointer, inputInterface, outputInterface, framePointer);
if (error != B_OK) {
TRACE_CFI("Failed to unwind call frame: %s\n", strerror(error));
return B_UNSUPPORTED;
}
TRACE_CFI_ONLY(
TRACE_CFI("unwound registers:\n");
for (int32 i = 0; i < registerCount; i++) {
const Register* reg = registers + i;
BVariant value;
if (previousCpuState->GetRegisterValue(reg, value))
TRACE_CFI(" %3s: %#lx\n", reg->Name(), value.ToUInt32());
else
TRACE_CFI(" %3s: undefined\n", reg->Name());
}
)
status_t
DebugReportGenerator::_DumpDebuggedThreadInfo(BFile& _output,
::Thread* thread)
{
AutoLocker< ::Team> locker;
if (thread->State() != THREAD_STATE_STOPPED)
return B_OK;
status_t error;
StackTrace* trace = NULL;
for (;;) {
trace = thread->GetStackTrace();
if (trace != NULL)
break;
locker.Unlock();
fTraceWaitingThread = thread;
do {
error = acquire_sem(fTeamDataSem);
} while (error == B_INTERRUPTED);
if (error != B_OK)
break;
locker.Lock();
}
BString data("\t\tFrame\t\tIP\t\t\tFunction Name\n");
WRITE_AND_CHECK(_output, data);
data = "\t\t-----------------------------------------------\n";
WRITE_AND_CHECK(_output, data);
for (int32 i = 0; StackFrame* frame = trace->FrameAt(i); i++) {
char functionName[512];
BString sourcePath;
target_addr_t ip = frame->InstructionPointer();
FunctionInstance* functionInstance;
Statement* statement;
if (fTeam->GetStatementAtAddress(ip,
functionInstance, statement) == B_OK) {
BReference<Statement> statementReference(statement, true);
int32 line = statement->StartSourceLocation().Line();
LocatableFile* sourceFile = functionInstance->GetFunction()
->SourceFile();
if (sourceFile != NULL) {
sourceFile->GetPath(sourcePath);
sourcePath.SetToFormat("(%s:%" B_PRId32 ")",
sourcePath.String(), line);
}
}
data.SetToFormat("\t\t%#08" B_PRIx64 "\t%#08" B_PRIx64 "\t%s %s\n",
frame->FrameAddress(), ip, UiUtils::FunctionNameForFrame(
frame, functionName, sizeof(functionName)),
sourcePath.String());
WRITE_AND_CHECK(_output, data);
// only dump the topmost frame
if (i == 0) {
locker.Unlock();
error = _DumpFunctionDisassembly(_output, frame->InstructionPointer());
if (error != B_OK)
return error;
error = _DumpStackFrameMemory(_output, thread->GetCpuState(),
frame->FrameAddress(), thread->GetTeam()->GetArchitecture()
->StackGrowthDirection());
if (error != B_OK)
return error;
locker.Lock();
}
if (frame->CountParameters() == 0 && frame->CountLocalVariables() == 0)
continue;
data = "\t\t\tVariables:\n";
WRITE_AND_CHECK(_output, data);
error = fNodeManager->SetStackFrame(thread, frame);
if (error != B_OK)
continue;
ValueNodeContainer* container = fNodeManager->GetContainer();
AutoLocker<ValueNodeContainer> containerLocker(container);
for (int32 i = 0; i < container->CountChildren(); i++) {
data.Truncate(0L);
ValueNodeChild* child = container->ChildAt(i);
containerLocker.Unlock();
_ResolveValueIfNeeded(child->Node(), frame, 1);
containerLocker.Lock();
UiUtils::PrintValueNodeGraph(data, child, 3, 1);
WRITE_AND_CHECK(_output, data);
}
data = "\n";
WRITE_AND_CHECK(_output, data);
}
data = "\n\t\tRegisters:\n";
WRITE_AND_CHECK(_output, data);
CpuState* state = thread->GetCpuState();
BVariant value;
const Register* reg = NULL;
for (int32 i = 0; i < fArchitecture->CountRegisters(); i++) {
reg = fArchitecture->Registers() + i;
state->GetRegisterValue(reg, value);
if (reg->Format() == REGISTER_FORMAT_SIMD) {
data.SetToFormat("\t\t\t%5s:\t%s\n", reg->Name(),
UiUtils::FormatSIMDValue(value, reg->BitSize(),
SIMD_RENDER_FORMAT_INT16, data).String());
} else {
char buffer[64];
data.SetToFormat("\t\t\t%5s:\t%s\n", reg->Name(),
UiUtils::VariantToString(value, buffer, sizeof(buffer)));
}
WRITE_AND_CHECK(_output, data);
}
return B_OK;
}